We would like to announce the release of LexChecker, an English web-based corpus query service developed at National Central University in Taiwan. LexChecker takes as query input an English word and provides as output a list of chunks or multiword strings in which that word is conventionally used. The chunks in turn are each linked to example sentences from BNC. The listed chunks are not only word strings but can also contain slots indicating limited substitutability within a part of speech. Thus the results show not only strings but patterns of the target word’s use. To try the service and to see further description, please visit http://www.lexchecker.org .